That's not even true. It was reduced slightly, which is only relevant for really expensive houses.

However the much higher standard deduction essentially means that most people no longer itemize.

True, but that is not the same as "mortgage interest is no longer deductible".

It is, subject to the overall $10K cap.

You're confusing that with property taxes, which are lumped in with the SALT deductions, which are indeed capped at $10k.

Mortgage interest payments are still fully deductible, up to $750k of principal.